Symbol of organizations, protecting of nature, crane first began in the United States. There, to save the endangered American crane, scientists underlay its eggs in the nests of other populations of cranes, which were sent to the breeding in a safe place. Day, when the nesting off a clutch of rescued birds, and became the environmental holiday.
Even in ancient Greece cries of cranes during migration, heralded the spring planting and early harvest. And so far this bird symbolizes spring, sun, warmth and nature awakens.